more on that from nasa in a moment. we begin with kirit radia in moscow. >> reporter: it came out of nowhere. a bright speck in the sky, soon streaking across the horizon, followed by an almost apocalyptic scene. a blinding flash of light, and then all hell broke loose. [ explosion ] dizzying explosions, shattering windows, knocking these office workers to the ground. these students were lucky, protected by curtains from the flying glass. and these men barely escaped the blast. [ explosion ] in the streets -- pandemonium. terrified residents thought the world was ending. "people started to panic. somebody screamed, 'the end of the earth, he says. the chaos of the meteor captured on cell phones and the dashboard cameras of cars, so popular here in russia. the blast was so powerful, it knocked down a wall at this factory. in all, over 1200 people were injured, mostly from broken glass. 3,000 buildings damaged, over a million square feet of glass shattered. many were injured after going to the window to check out the flash